Biography
Martin Valko, also known as Sergej Petronov, is a former Slovak pornographic actor who appeared in gay porn movies and magazines. He is 6'1", and weighed about 190 lbs. when he was making movies. He performed in both the top and bottom roles. Valko was in a car accident in 1997 that ended his video career and injured him badly, although he did recover.
Movies & TV Shows
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The Chain Reaction (1996) — Builder
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Sauna Paradiso (1994)
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Tender Strangers (1993) — Sergej
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Accidental Lovers (1993)
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Lukas' Story (1994)
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Lukas' Story 2: When Boy Meets Boy (1995)
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The Plowboys (1994)
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Nighthawken (1996)
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Lukas' Story 3 (2008)
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Barely Legal (1996)
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Boy: Bohemian Boys (1995)
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Lukas' Stories (2002)